380 Annals of the Carnegie Museum. 



39. Gryllus argentinus Saussure. 



Gryllus argentinus Saussure, Miss. Mex. (1874), p. 399; Mem. Soc. Geneve, XXV 

 (1877), p. 152; KiRBY, Syn. Cat. Orth., II (1906), p. 37. 



Habitat. — ^There is a single male specimen of a Gryllus at hand, 

 which I refer to this species. It comes from Tucuman, Argentina, 

 where it was taken October 19, 1912, by W. J. Holland. A female 

 from the Province del Sara, Bolivia, may also belong here. It is 

 quite pale in its general color. 



This species is also reported to occur in Paraguay and Brazil. In 

 fact, there are three female specimens in the present collection from 

 Para, which I have so labeled, although with some doubt as to the 

 correctness of the determination. The length of the ovipositor (14-15 

 mm.) seems to agree better with the measurements given for assimilis. 



40. Gryllus assimilis Fabricius. 



Gryllus assimilis Fabricius, Syst. Ent. (1775), p. 280; Oliver, End. Meth., VI 

 (1791), p. 634; BuRMEisTER, Handb. Ent., II (1838), p. 733; Saussure, Miss. 

 Mex. (1874), p. 396, PL 8, figs. 27-29; Mem. Soc. Geneve, XXV (1877), p. 150, 

 Biol. Cent.-Amer., Orth. I (1897), p. 226, PI. 11, fig. 20. 

 For further synonymy see Kirby, Syn. Cat. Orth., II, p. 37. 



Habitat. — This is without doubt the most abundant and widely 

 distributed species of the genus in tropical America. It is known to 

 occur in most of Mexico, in Central America, in the West Indies, and 

 in South America to Bolivia, Paraguay, and northern Argentina. 

 Specimens are at hand from Cuba and the Isle of Pines, West Indies, 

 Bahia, Brazil, and from Puerto Suarez, Sta. Cruz de la Sierra and 

 Province del Sara, Bolivia. 



Genus MiOGRYLLUS Saussure. 



Miogryllus Saussure, Mem. Soc. Geneve, XXV (1877), p. 194; Biol. Cent.-Amer., 

 Orth. I (1897), p. 227; Scudder, Psyche, IX (1901), p. 256; Kirby, Syn. Cat. 

 Orth. I (1906), p. 38. 



The represent ati\cs of the present genus are American and are to 

 1)0 found in tlie countries of North and South America between the 

 fortieth parallels of latitude. At least a dozen species have been 

 recognized and described, fully half of which belong to, or probably 

 occur in, the region of which this paper treats. 



Owing to the different characters used by authors in their descrip- 

 tions, it seems rather difficult to make a practical synoptical key for 



